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Electromagnetic Decay Properties of High-spin States in 91Tc

Rudolph, Dirk LU ; Gross, C. J.; Harder, A.; Kabadiyski, M. K.; Lieb, K. P.; Weiszflog, M.; Altmann, J.; Dewald, A.; Eberth, J. and Mylaeus, T., et al. (1994) In Physical Review C (Nuclear Physics) 49(1). p.66-82
Abstract
High spin states in the nucleus Tc-91 have been studied via the fusion evaporation reaction Ni-58(Ar-36,3p)Tc-91, at 149 MeV and 140 MeV beam energy. The OSWS spectrometer, an additional high purity Ge detector at 162 degrees, and several particle detectors were used to measure gamma gamma- and particle-gamma coincidences, directional correlations of oriented states, and line shapes due to Doppler-shift attenuation. Lifetimes in the 10(-12)-10(-9) S range were measured by the recoil distance Doppler-shift method. Some 110 transitions were placed into a level scheme comprising 51 levels reaching up to 12.2 MeV excitation energy and a possible spin I = 49/2 h ($) over bar. A large number of spin-parity assignments and E2/M1 mixing ratios and... (More)
High spin states in the nucleus Tc-91 have been studied via the fusion evaporation reaction Ni-58(Ar-36,3p)Tc-91, at 149 MeV and 140 MeV beam energy. The OSWS spectrometer, an additional high purity Ge detector at 162 degrees, and several particle detectors were used to measure gamma gamma- and particle-gamma coincidences, directional correlations of oriented states, and line shapes due to Doppler-shift attenuation. Lifetimes in the 10(-12)-10(-9) S range were measured by the recoil distance Doppler-shift method. Some 110 transitions were placed into a level scheme comprising 51 levels reaching up to 12.2 MeV excitation energy and a possible spin I = 49/2 h ($) over bar. A large number of spin-parity assignments and E2/M1 mixing ratios and lifetimes were deduced. This extensive data set is used for a detailed test of shell model calculations. They were performed with different sets of parameters, within either a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)), and nu(g(9/2)) configuration space or an enlarged configuration space including the pi(p(3/2)) and pi(f(5/2)) orbits. (Less)
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Physical Review C (Nuclear Physics)
volume
49
issue
1
pages
66 - 82
publisher
American Physical Society
external identifiers
  • scopus:0002454737
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0556-2813
DOI
10.1103/PhysRevC.49.66
language
English
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8a706b3e-d595-4820-bfe3-84f61a624218 (old id 3964526)
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2013-08-13 18:51:28
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@article{8a706b3e-d595-4820-bfe3-84f61a624218,
  abstract     = {High spin states in the nucleus Tc-91 have been studied via the fusion evaporation reaction Ni-58(Ar-36,3p)Tc-91, at 149 MeV and 140 MeV beam energy. The OSWS spectrometer, an additional high purity Ge detector at 162 degrees, and several particle detectors were used to measure gamma gamma- and particle-gamma coincidences, directional correlations of oriented states, and line shapes due to Doppler-shift attenuation. Lifetimes in the 10(-12)-10(-9) S range were measured by the recoil distance Doppler-shift method. Some 110 transitions were placed into a level scheme comprising 51 levels reaching up to 12.2 MeV excitation energy and a possible spin I = 49/2 h ($) over bar. A large number of spin-parity assignments and E2/M1 mixing ratios and lifetimes were deduced. This extensive data set is used for a detailed test of shell model calculations. They were performed with different sets of parameters, within either a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)), and nu(g(9/2)) configuration space or an enlarged configuration space including the pi(p(3/2)) and pi(f(5/2)) orbits.},
  author       = {Rudolph, Dirk and Gross, C. J. and Harder, A. and Kabadiyski, M. K. and Lieb, K. P. and Weiszflog, M. and Altmann, J. and Dewald, A. and Eberth, J. and Mylaeus, T. and Grawe, H. and Heese, J. and Maier, K. H.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {1},
  pages        = {66--82},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {Electromagnetic Decay Properties of High-spin States in 91Tc},
  url          = {http://dx.doi.org/10.1103/PhysRevC.49.66},
  volume       = {49},
  year         = {1994},
}